Hi,
I just now tried to access dbca through putty(X forwarding enabled) with xming and recived the following error:
[oracle@EXA01 bin]$ ./dbca
DISPLAY not set.
Set DISPLAY environment variable, then re-run.
I tried xterm as Oracle but it's not availible to Oracle.

Do you connect to your EXA01 server as root and changes to the oracle account with su? The easiest way is a direct connection to the oracle account on the EXA01 server with ssh. Should this not possible you have to use "ssh -X" for every further connection.

Hi,
Thanks for the answers...
I'm connecting from my client computer a Windows 7 with putty (X forwarding) and have installed Xming. This works for most environments but not against our new Exadata's. I connect as Oracle and i do not change user.
As far as I can understand in the documentation there should be no need to use EXPORT DISPLAY=
Anyone have any idea on how to resolve this issue?

And if I try from a Linux install (Ubuntu) I get this message when logging on:
X11 forwarding request failed on channel 0
And this when I try to start DBUA:
[oracle@exa1 bin]$ ./dbua
DISPLAY not set.
Set DISPLAY environment variable, then re-run.